Die for casting bearing liners



,euredu stent July 22, 1924.

JOH'N L.. MORRIS, OF LOS ANGELIS, CALIFORNIA.

DIE FOR CASTING BEARING LINEBS.

q Application led September 7, 1921, Serial No. 498,978. Renewed May 5, 1924.

To all whom t may concern:

.Be it known that I, JOHN L. MORRIS, a citizen of the United States, residing at Los Angeles, in thecounty of Los Angeles and State of California, have invented a new and useful Die for Casting Bearing Liners, of which the following is a specification.

This invention relates to the art of casting metallic objects in steel dies for the purpose of producing a casting which will adhere sufficiently closely to a predetermined size and be of such a nish that it may be put into use withoutA machining or further mechanical attention, and relates particularly to the casting of bearing liners.

In the present methods of die casting bearing liners a certain porosity ofthe casting results from the fact that the molten metal is introduced into the matrix suddenly and in a turbulent condition which does not al- 'low the entrained air land gases to separate from thev body of molten metal and consequently the metal`solidies with certain portions thereof in a sponge-like condition.

It is an object of my invention to provide a die in which the molten metal is rst introduced -into a surge chamber in which the entrained gases may separate from the body of molten metal and the metal may then iow horizontally and quietly into the matrix.

It is a further object of my invention to provide a die of this type from which the casting may be easily removed.

. Other objects and advantages will be made evident hereinafter;

Referring to the drawing. which is for i1- lustrative purposes only:

Fig. 1 is a perspective view of a bearing liner cast in a die embodying m invention.

Fig. 2 is an elevation of the die employed to cast the liner shown in Fig. 1, the upper ortion of the die being shown in section to illustrate the interior construction.

Fig. 3 is a fragmentary section upon a plane represented the line 3-3 of Fig. 2.

- Fig. 4 is a vertica cross section taken on a plane represented by the line 4 4 of Fig. 2.

Upon a base block 11 I mount a column 12 having formed-therein a channel 13 forming a pourin spout, the column being sen t e lock 11 by cap screws 14.

Centrally from the upfper surface 15 of the block 11 is raised a substantially 'semicircular core 16 extendin from the end 17 of the block 11 to a point 18 adjacent to the column 12. Near the end 19 of the core 16 is formed a recess 20 presenting the inner contour21 of the liner 22 shown in Fig. 1. Over the core 16 is placed a cap 30 fitting closely against the front face of the column 12 and the sides 32 of which litclosely down against the surface 15 of the' block. This cap 30 is contoured to produce the outer formation 36 of the liner 22.

When the cap 30 is in. place upon the ythe molten metal and generated from. such impurities as may be present are"allowedy to separate therefrom before the metal ows through the horizontal passages between the surge chamber and the matrix formed by relieving the dividing wall in the manner indicated at 51. lThe level of the metal 39 will mount at al constant rate in both the chamber 40 and the matrix as the molten metal is poured in through the spout 13 and after the level passes the top of the passage between the chamber and the matrix, the small amount of gas arisin from the metal within the matrix is passed oi through the vent risers 58.

It will be perceived that the construction of this die also allows the-cap-BO and the casting 22 to be freely removed from off the core 16 Without interference from the resence of the body of metal in the surge c amber 40, and that the elimination of turbulence 1n the molten metal within the matrix results in a product having a. very fine texture which is especially desirable in bearings.

. I claim as my invention:

A die for forming hollow semi-cylindrical objects comprising walls forming a cavity having the sha e of the desired ob'ect, the axial plane g the edges of t semizontal; and walls formjn a vertical channel 'extending from sai plane upwardly through the top of the mould, the substance of the mould bein out away to provide an open communication between said vertical column and the end of said cavity, the openings between said channel and said cavity YLacasse extending from a int in saidy plane to a point at or near 't e highest point of said 10 cavity.

In testimony whereof, I have hereunto set my hand at Seattle, Washington, this 26th day of August, 1921.

l JOHN L. MORRIS. 

